Analysis of the properties of ceramic glazes with the substitution of granite ornamental rock waste from the Seridó Potiguar region

Abstract

Ceramic glazes are widely used in sectors such as artistic ceramics, coatings, and sanitary ware. However, due to the increasing scarcity of mineral resources, the search for new alternatives has intensified. This study aims to investigate the replacement of sodium and potassium feldspars, commonly used in ceramic glazes, with ornamental rock waste from the Seridó Potiguar region in the State of Rio Grande do Norte. The rock waste will undergo beneficiation processes (milling and sieving) and characterization (XRD and XRF), and will be incorporated in proportions of 5%, 10%, and 15% into glaze formulations. The samples will be tested at temperatures of 1000°C, 1100°C, 1150°C, and 1200°C. Technological tests will include water absorption, apparent porosity, linear shrinkage, loss on ignition, and apparent specific mass. The results will allow for evaluating the physicochemical performance of the formulations and their feasibility compared to traditional products, offering a sustainable alternative for the ceramic industry.